Usually when engineers think of rolled screws, they think of something that isn't very precise—with lead errors in the neighborhood of 0.01 inch per linear ft. Not any longer. Engineers at Nook Industries have reportedly come up with a way to thread roll screws with a lead error of just 0.0001 inch per linear ft—accuracy that's on the order of more expensive ground screws. The only limitation of the rolling process, engineers say, is that the outer diameter of the thread dictates the maximum diameter on the screw. Nook engineers say the advancement was "the result of better control of the rolling process." The benefits, says Chief Engineer Rick Christyson, are the cost savings (he estimates about one third the cost of a ground screw) and shorter, more reliable delivery schedules. Typical lead times for ground screws are variable, ranging from weeks to even months, says Christyson. Rather than going to head-to-head with ground screws, though, Nook says that it will target the market served by servo-hydraulics, which involves high loads, high speeds, and precision motion. Though the company won't release the new rolled screws until this summer, it's currently Beta-testing them with several customers in the OEM machine market. So far, so good, says Nook.
The word “smart” is becoming the dumbest word around. It has been applied to almost every device and system in our homes. In addition to smartphones and smart meters, we now hear about smart clothing and smart shoes, smart lights, smart homes, smart buildings, and every trendy city today has its smart city project. Just because it has a computer inside and is connected to the Web, does not mean it is smart.
Are you being paid enough? Do you want a better job? According to a recent survey Manpower released just before Engineers Week, employers and engineers don't see eye-to-eye about the state of US engineers' skills and experience.
Two issues have been the bane of the plastics industry for as long as one can remember: The ban on plastic grocery bags and whether the use of bisphenol A (BPA) in plastics such as polycarbonate and PVC is harmful to humans.
Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.